US3650871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing insulating panels
Assignee: Individual
•
Filing: 1969-06-09
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Granted: 1972-03-21
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Expires: 1989-06-09
Abstract
Abstract A method for producing insulated panels of a honeycomb structure surrounded by a frame, in which the panels are continuously fed below a discharging device which fills the honeycomb with polystyrene, granular or ground waste material having insulating properties. Before or after filling, the honeycomb structure may be closed by a subjacent cover board or sheet, and an upper cover board or sheet is applied after filling, the upper and lower cover boards or sheets being adhesively bonded to the honeycomb.
Inventors
- 👤 Karl Waldemar Bentfors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:19
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/18; B29C44/186; B29C44/20; B29C44/206; B29C44/32; B29C44/326; B29C44/34; B29C44/3415; B29C44/3426; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29D; B29D24/00; B29D24/002; B29D24/005; B29D99/00; B29D99/001; B29D99/0021; B32B15/00; B32B15/04; B32B15/046; B32B27/00; B32B27/06; B32B27/065; B32B37/00; B32B37/12; B32B37/14; B32B37/146; B32B5/00; B32B5/18; B32B5/20; B32B7/00; B32B7/04; B32B7/12; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; F; F16; F16L; F16L59/00; B29C33/00; B29C33/34; B32B2305/00; B32B2305/02; B32B2305/022; B32B2305/024; B32B2307/00; B32B2307/30; B32B2307/304; B32B2317/00; B32B2317/12; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1003; Y10T156/1052; Y10T156/1084; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |